您要保留数字->字母分配的一般结构是一个或多个数组，类似于：

// 0 = N, 1 = L, 2 = T, 3 = D, 4 = R, 5 = V or F, 6 = B or P, 7 = Z, 
// 8 = H or CH or J, 9 = G
$numberMap = new Array (
    0 => new Array("N"),
    1 => new Array("L"),
    2 => new Array("T"),
    3 => new Array("D"),
    4 => new Array("R"),
    5 => new Array("V", "F"),
    6 => new Array("B", "P"),
    7 => new Array("Z"),
    8 => new Array("H", "CH", "J"),
    9 => new Array("G"),
);

然后，一些递归逻辑为我们提供了类似于以下功能：

function GetEncoding($number) {
    $ret = new Array();
    for ($i = 0; $i < strlen($number); $i++) {
        // We're just translating here, nothing special.
        // $var + 0 is a cheap way of forcing a variable to be numeric
        $ret[] = $numberMap[$number[$i]+0];
    }
}

function PrintEncoding($enc, $string = "") {
    // If we're at the end of the line, then print!
    if (count($enc) === 0) {
        print $string."\n";
        return;
    }

    // Otherwise, soldier on through the possible values.
    // Grab the next 'letter' and cycle through the possibilities for it.
    foreach ($enc[0] as $letter) {
        // And call this function again with it!
        PrintEncoding(array_slice($enc, 1), $string.$letter);
    }
}

递归三声欢呼！这将通过以下方式使用：

PrintEncoding(GetEncoding("052384"));

并且，如果您真的希望将其作为数组，请使用输出缓冲并使用“ \ n”作为拆分字符串进行爆炸。